palmer and j



K. A. PALMER AND J. G. IRVIN.

MOLD.

APPLICATION FILED JULY 5, ENE- 1,307,372. Patented June 24, 1919.

3 SHEETS -SHEET 3- 5 M/a Z y 1- I I 31 1 \J I F n t 8 UNITED STATES PATENT OFFICE.

mammal-I A'QBALMQB AII'D'JOHN o. mvm, or NEW YORK, n. Y.

noun.

er di a i n of Iletters instant- Patcn'tedJune 24, 1919.

nppliqation me my a, 1913. seria 'no. 2431.667.

To all whom itmwconwm: Y

Be it known that w liaaam A. Pittman and JonN G, 1mm, citizens of the United States, rcsidi'nfl at New York, county of New York, and State of New York, have invented certain new and useful" Improvements in" M'olds, of Whichthe following is a specification; I

One object of'our invention is to'pr'ovide a mold which Millie-particul rl adapted for use in vulea'nizing the joined ends of rubber tubes, such for example as'the inner tulies of automobile=tiires Another object of our-invention is to revide a mold which will readily ada t iself to support a mandrel so that the l; tel can firmly hold the portion of the rubber tube, which is to he treated, in engagement with the steam-heated inner surface of the mold.

A further object isto' construct such a mold in a manner which will permit the mandrel and the rn'ober tubes to be freely inserted and removed.

A still further object is a so construct our improved moldthat a great elficiency will be secured from the steam which is inserted therein to cause the vulcanizing.

A further object is to rovide our improved mold with meanswherehy a mandrel can be quickly and easily suspended and ex pandedtherem;

These objects and other advantageous ends which will be described hereinafter, We attain in the following manner, reference begin had to' the accompanying drawings in W- in Figure 1 is a topplan View" 01 our imroved mold ,showing'amandrel in the position which it oeenples when ready for the vulcanizing process,

Fig; 2 is a seeti onuon the line 2-2 of 1 shhwing the mandrel mom-si e e the tube; to be Vulcanized; in dot-and -dash lines,

Fig. 3 is a view of similar nature to Fig. 1 showing how the" mold appears Without the mandrei or the raster tithe,

Fig. 4 is a'fragmentazr-y sectional elevation taken on the line 4 4Cof Fig. 8 anddrawn ,on a nedueed Scale,

Fig.5 is fragmentary section taken on the line 55 of mg. *3,

Fig. 6 is a fragmentar 1 sectional plan taken on the line 66 0H? Referring to the drawings, 1 represents our improved mold which includes two sections 2 and 3 when are-thrice? together at 4. The section is preferably held stationary, while the section 3 is pern'litteil, when the mold is to be opened, to swing on the hinge 4. Each of the sections 2 and 3 is substantially semi-circular in cross section, and interlapped joints 5 and 6 are provided so that the sections will neatly fit together, These interlapped joints 5 and 6 can be machinedso as to form a neat fit and so that the inner surface 7 of each of the sections 2 and 3 will be flush.

The section 2 has two integral arms 8 which form a hearing or bracket for an arcuate clamp arm 9 which is hinged or pivoted at 10. The end 11 of the clamp arm 9 has a conical extension 12 which is adapted to fit within a recess 13 in the side surface of the mold section 2. The opposite end 14' of the clamp arm 9 supports a clamp screw 15 which can be operated by a. handle 16 to firmly bind and hold the sections 2 and 3 together, as clearly shown in Fig. 1. The clamp screw 15 is adapted to engage a recess 17 in the mold section 3 so that by the aid of the recesses 13 and 17 the clamp members can quickly find their centers and thereby render the clamping action easy.

The section 2 has a steam chamber 18 which extends substantially throughout its entire curvature, and the section 3 also has a steamchamloer 19 which extends substantially throughout its curvature. Each of the steam chambers 18 and 19 has bottom surfaces 20 which slant from the front to- Ward the hack for a purpose hereinafter to be described? Pet or drain cocks 21 are provided for the purpose of draining off the cold air from the steam chambers.

The section2 is provided with a steam inletpassage 321 and a steam pipe 22 is fitted therein;- as clearly shown in Fig. 4. In similar manner, the steam chamber 19 of the section 3 has a steam inlet passage 23 which is providedwith a nipple so that a flexihis liege orthe like (not illustrated) can be attached thereto to admit the steam and pernrit the pivotal movement of the section 3 h he hing The steaminlet passages 21 and 23 enter the hotlioms ll ofthe respective steam chamhers at their lowest points so that the waber of condensation l romsteam will drain toward nmd intothe steamd nlet assages 21 and 23 so that the steam chainhers 'Will he kept free from water. Our improved "mold, therefore, is self draining since the water of condensatidfl drainsinte the steam inlet pas sages, and we therefore consider this a valuable and advantageous feature of our invention.

The upper end of the section 2 is provided with extensions 25 which have sockets 26 formed therein adapted to receive fingers 27 on a mandrel 28 so that in this manner the mandrel 28 can be suspended within the opening 29 of the mold, as clearly shown in Figs. 1 and The mandrel 28 is of a type adapted to be slightly ex anded by a downward movement of a we ge-shaped member 30, said member having a slot 31 formed therein. In other words, the mandrel 28 is made in sections 32 and 33 which are hinged together at 34 and by moving the member 30 downwardly the sections 32 and 33 are slightly expanded or increased in diameter and serve to tightly press the rubber tube 35 which is to he vulcanized and which sur rounds the mandrel 28, against the inner surface 7 of the mold.

To move this member 30 to cause the expansion of the mandrel sections, we provide an operating lever 36 which is pivotally mounted at 37 to a. bracket 38 on the top of the section 2 of the mold. The lever 36 has a pin 39 thereon adapted to engage the slot 31 in the member 30. The pivotal connection 37 for the lever 36 is such as to permit sufficient lateral movement of said lever to allow the pin to enter the slot 31 and to be freely removed therefrom. It is obvious that since the mandrel 28 is hung within the mold 1 through the engagement of the fingers 27 with the sockets 26 that a downward movement of the lever 36 will cause the member 30 to be moved downwardly and thereby expand the sections 32 and 33 as above set forth. The tube 35 to be vulcanized is so placed on the mandrel and within the mold that when steam is admitted into the chambers 18 and 19, the portion of the tube adjacent these chambers will be vulcanized and, as shown in the drawings, a seam 40 of the rubber tube is so positioned that the rubber immediately adjacent said sea-m will be vuleanized, thereby pro erly closing said seam and securing the en s of the tube together.

Vhile we have described our invention as taking a particular form, it will be understood that the various parts of our invention may be changed without departing from the spirit thereof, and hence we do not limit ourselves to the precise construction set forth, but consider that we are at liberty to make such changes and alterations as fairly come within the scope of the appended. claims.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

l. A mold of the character described having an opening extending theretln'ough in a substantially vertical direction; an expansible mandrel adapted to be positioned within said opening; means for engagement with. the top of said mold for suspending said mandrel in said opening; and mechanical means mounted independently of said mandrel and having a portion adapted to engage a part of said mandrel to effect the expansion of the latter within the mold, substantially as described.

2. A mold including two sections hinged together; a pivotally mounted double-ended clamp arm adapted to embrace said sections when together, said clamp arm being pivoted at a position to the rear of the pivot of said sections; and clamping means carried by said arm for firmly holding said sections together, substantially as described.

3. A. mold of the character described hav ing an opening extending therethrough in a substantially vertical direction; an expansible mandrel adapted to be positioned within said opening; and means for engagement with the top of said mold for suspending said mandrel in said opening, substantially as described.

4. A mold of the character described including sockets; an expansible mandrel adapted to be inserted within said mold and having portions for engagement with said sockets whereby the mandrel is suspended within said mold; and mechanical means for expanding the mandrel when so suspended, substantially as described.

5. A mold of the character described including sockets; an expansible mandrel adapted to be inserted within said mold and having portions for engagement with said sockets whereby the mandrel is suspended within said mold, said mandrel including means which, when moved, causes its expansion; and mechanical means for moving said latter means to cause the expansion of said mandrel, substantially as described.

6. A mold of the character described including sockets; an expansible mandrel adapted to be inserted within said mold and having portions for engagement with said sockets whereby the mandrel is. suspended within said mold, said mandrel including means which, when moved, causes its expansion; and a pivoted lever for moving said latter means to cause the expansion of said mandrel, substantially as described.

In testimony whereof we have signedour names to this specification in the presence of two subscribing witnesses.

KENNETH A. PALMER. JOHN C. IRVIN. Witnesses:

PETER S. OHARA, LEWIS MILTON.

Ooplu of thin patent may be obtained for in cent! each, by addrctnlng the "Gammluioncr a! Paton, wnhlngton, D. G. 

